Presented is an intervertebral disc implant (20) for total replacement of the intervertebral disc (3) in the cervical vertebra, comprising two articulating members (21, 25), with the lower member (21) on its upper surface Adapted to engage the upper vertebral body (1) with its lower surface having convex projections (23) and the lower member (25) engaging the lower vertebral body (4) on the lower surface The upper surface of which has a hook-like protrusion (27), the hook-like protrusion is convex in the longitudinal front-rear profile and the convex of the upper member (21) in the cross-sectional profile A concave shape having approximately the same diameter as the projection (23), thus allowing a flexion-extension movement on the center of the variable convolution, in addition, depending on the diameter of the convex projection (23) of the upper member (21) Via a second independent center of rotation located above the disc implant (20) at a defined distance. Allow handed and lateral bending, thus, allowing the linked movement for independent rotation and side bending from flexion / extension, therefore, to reproduce the natural kinematics of the cervical disc more closely. [Selection] Figure 2提示されるのは、頸椎内の椎間板（３）の全置換のための椎間板インプラント（２０）であって、２つの関節部材（２１，２５）を備え、下側部材（２１）がその上部面で上部椎体（１）と係合するように適合され、その下部面が凸状突起（２３）を有し、下側部材（２５）が下部面で下部椎体（４）と係合するように適合され、その上部面が鞍状突起（２７）を有し、鞍状突起は、長手方向の前後輪郭では凸状であり、且つ、横断側面の輪郭では上側部材（２１）の凸状突起（２３）と概ね同じ直径を持つ凹状であり、従って、可変の回旋の中心上での屈曲－伸展運動を許容し、加えて、上側部材（２１）の凸状突起（２３）の直径によって画定される距離で椎間板インプラント（２０）の上に位置する第２の独立した回旋の中心を介した回旋及び側屈を許容し、従って、屈曲／伸展から独立した回旋及び側屈のための連結した運動を許容し、従って、頸椎椎間板の自然な運動学をより厳密に再現する。【選択図】図２
